JP6633407B2 - Solenoid and manufacturing method thereof - Google Patents

Description

The present invention relates to a solenoid used for various devices such as a key of a cash box of a register and a lock release mechanism of a shift lever of an automobile.
More specifically, the present invention relates to a solenoid that can be easily assembled using a low-priced, small-sized hand press without caulking a yoke or a stopper with a large-sized press, and a method of manufacturing the same.

  An existing solenoid generally has a yoke body having a channel-like cross section having upper side walls on opposite side edges of a bottom surface, a stopper receiver fixed on the bottom surface, and mounted on the plunger. And a yoke lid for closing the opening of the yoke.

  Such a solenoid generally includes a step of fixing a plunger receiver serving as a fixed iron core at the center of the upper surface of the bottom plate of the yoke, and a step of fitting a cylindrical coil to the fixed iron core. The engaging pieces formed on the opening side of the yoke at the opposite side edges of the lid body are engaged with the engaging portions formed at the upper edges of the opposing side walls of the yoke by caulking means. It is manufactured through a process of forming a plunger (movable iron core).

On the other hand, a plunger-type electromagnet is proposed in Japanese Utility Model Laid-Open No. 55-79513 (Patent Document 1) as an example in which caulking means is not used in manufacturing a solenoid.
The plunger-type electromagnet disclosed in Patent Document 1 has an electromagnet coil around which a plunger-type electromagnet is wound and placed at substantially the center of a yoke having a channel-shaped cross section, and the center of a yoke piece bridging the ends of the yoke. The plunger moves in and out through a through hole penetrating the hollow body of the spool, and an iron core facing the plunger via a yoke piece is provided between the enlarged hollow portion of the spool and the yoke. The iron core is bonded and fixed to the yoke.

Japanese Utility Model Publication No. 55-79513 (claims for registering utility models, FIG. 1)

Generally, in manufacturing a solenoid, when the upper opening of the yoke main body is closed with a yoke lid, the upper opening is closed by caulking means, so that a large and expensive press equipment is indispensable, and a large work space is required. Can be
Furthermore, it is inevitably difficult to reduce the production cost of the solenoid, for example, a skilled worker is required for the caulking operation.

On the other hand, the plunger-type electromagnet described in Patent Document 1 does not employ caulking means, but uses a means for bonding and fixing an iron core facing the plunger to the center of the inner bottom surface of the yoke.
Therefore, in the assembling work, the number of steps is not significantly reduced, so that the assembling work cannot be said to be advantageous.

In view of this situation, the present invention uses a small and inexpensive hand tool (hand press) without using a large high-spin press, and a solenoid that can be easily assembled only by inserting and pressing components. The production method is not provided.

The invention described in claim 1 of the present invention
The stopper at the bottom of the coil bobbin, its proximal end is fixed in a state of protruding from the bottom portion, said coil bobbin, said bottom is decorated so as to be located on the opening side of the cross-section channel-shaped yoke body, the yoke body A solenoid, which is provided with a yoke lid in a crimped state at the opening thereof and closed.
One of the lid holding portions formed on the opposing side walls of the yoke main body is inserted such that the entirety of the yoke lid is inserted from the outside in the opposing direction, and the other is that the tip end of the yoke lid is inserted into the other lid holding portion from the inside. it is formed so as to be press-fitted is a solenoid, wherein.

The invention described in claim 2 of the present invention
The solenoid according to claim 1,
The yoke lid,
The thickness of the yoke cover is formed to be slightly thicker on the opposing side wall of the yoke main body than the cover holding portion formed so that the yoke cover can be pressed and inserted.

The invention according to claim 3 of the present invention provides:
The solenoid according to claim 1,
The yoke lid,
The thickness of the plate is formed to be slightly thicker than the vertical width of a lid holding portion formed so that the yoke lid can be press-fitted and inserted into opposing side walls of the yoke main body.

The invention described in claim 4 of the present invention is:
The solenoid according to claim 1,
The yoke lid,
The width of the yoke lid is formed to be slightly larger than the width of a lid holding portion formed so that the yoke lid can be press-fitted and inserted into opposing side walls of the yoke main body.

The invention according to claim 5 of the present invention provides:
The solenoid according to claim 1,
The yoke lid,
It is characterized in that it can be attached to and detached from the opening of the yoke main body.

The invention according to claim 6 of the present invention provides:
The solenoid according to claim 1,
The solenoid ,
The pair of locking portions in the upper edge of each side wall facing the opening of the yoke body is formed by relatively, in which the lid holder a space formed between the pair of locking portions It is characterized by the following.

The invention according to claim 7 of the present invention provides:
A stopper is fixed to the bottom of the coil bobbin such that its base end protrudes from the bottom, so that the coil bobbin is positioned in the channel-shaped yoke main body and the bottom is positioned on the opening side of the yoke main body. After is furnished, in the opening of the yoke body, in order to mount the Yokufuta in crimped state, the entire insert from the outside, which is the insertion of the Yokufuta the cover holding portion of one side wall of the yoke body the A method of manufacturing a solenoid, comprising inserting a tip end of a yoke lid into a lid holding portion of the other side wall in a press-fit state from the inside and cross-linking the same.

The solenoid of the present invention employs a configuration in which a coil bobbin is provided inside a yoke main body having a channel-shaped cross section and then a yoke lid is crimped to an opening of the yoke main body. This can be done using a press.
Therefore, the solenoid can be easily manufactured without requiring a large work place for caulking and fixing as in the past.

  Further, since the yoke main body and the yoke lid constituting the solenoid intersect with each other, an engagement portion with the yoke main body is formed, and the structure is strong against impact force (collision force) of plunger operation.

  On the other hand, according to the method of manufacturing a solenoid of the present invention, after the coil bobbin is provided inside the yoke main body, the yoke lid is crimped to the opening of the yoke main body, so that the same or more effect as the conventional caulking means is imparted to the solenoid. The solenoid can be assembled using a small and inexpensive hand press.

As a result, since the worker does not move to the work place where the large press device is installed, the production efficiency can be further improved.
At the same time, the assembling work can be performed in a work space as small as a table, so that the assembling efficiency can be greatly improved.

It is a perspective view showing an example of the solenoid concerning the present invention. FIG. 2 is an exploded perspective view of the solenoid shown in FIG. FIG. 4 is a perspective view showing another example of the solenoid according to the present invention. FIG. 6 is a perspective view showing still another example of the solenoid according to the present invention. FIG. 6 is a perspective view showing still another example of the solenoid according to the present invention. It is a perspective view showing other examples of a yoke main body which constitutes a solenoid of the present invention. FIG. 9 is a perspective view showing still another example of the yoke main body constituting the solenoid of the present invention. FIG. 9 is a perspective view showing still another example of the yoke main body constituting the solenoid of the present invention. It is an enlarged view of the principal part which shows another example of the yoke main body which comprises the solenoid of this invention. It is an enlarged view of the principal part which shows another example of the yoke main body which comprises the solenoid of this invention.

Hereinafter, a solenoid according to the present invention and a manufacturing method thereof will be specifically described with reference to the accompanying drawings.
It should be noted that the present invention is not limited to the disclosed embodiment, but can be variously improved without changing the gist thereof.

As shown in FIG. 2, the solenoid 1 according to the present invention is mounted on the yoke main body 2 having a channel-shaped cross section, the coil bobbin 3 provided inside the yoke main body 2, and the opening of the yoke main body 2 in a press-contact state. And a yoke lid 4 to be used.
In the drawings, reference numeral 5 denotes a plunger 5 movably mounted in the coil bobbin 3, and reference numeral 6 denotes a stopper for preventing the plunger 5 from deviating from the yoke main body 2. is there.

The yoke main body 2 has a through hole 2a through which the plunger 5 is inserted in the bottom surface thereof, and the yoke lid 4 is engaged with the lower portion of the opposing side walls 2b, 2b in a crimped state. Holders 2c, 2c are formed respectively.
In this embodiment, since the engagement piece 4a is formed on the tip end surface of the yoke lid 4, at least one of the lid holding portions 2c, 2c formed on the yoke main body 2 (left side in the drawing) It is formed in a shape that is securely engaged with the engaging portion 4a.

The greatest feature of the present invention is that a yoke lid for closing an opening of a yoke main body is attached to the opening in a pressure-contact state.
As a means for such pressure bonding, for example, a means for increasing the thickness of the yoke lid than the upper and lower widths of the lid holding portion formed on the opposite side wall of the yoke main body, and a method for increasing the thickness of the lid holding portion above and below the yoke lid. There is no particular limitation on the configuration of the device as long as the device can crimp the yoke body and the yoke cover, such as a device for reducing the width, and a device for making the width of the yoke cover slightly smaller than the lateral width of the cover member.

In the solenoid 1 having such a configuration, first, after the stopper 6 is fixed to the bottom of the coil bobbin 3, the coil bobbin 3 is inserted into the yoke main body 2, and then the yoke lid 4 is inserted from the lid holding portion 2c of the one side wall 2b. Then, the leading end is press-fitted into the lid holding portion 2c of the other side wall 2b to be crosslinked.
Thereafter, the distal end of the plunger 5 is inserted through the through hole 2a formed in the bottom surface of the yoke main body 2, and the distal end of the plunger 5 is detachably held to the stopper 6. Then, the solenoid 1 is assembled.

The solenoid 11 shown in FIG. 3 has a cross section substantially equal to or slightly smaller than the width of the base end side of the yoke lid 23 to be used at the end of one side edge 21a opposed to the opening of the yoke main body 21 having a channel shape. And a lid insertion portion 21c narrower than the lateral width of the lid insertion portion 21b is formed on the other side wall 21a opposite to the lid insertion portion 21b. The yoke lid 23 having a plate thickness slightly larger than the vertical width of 21c may be closed by press-fitting.
In the drawing, reference numeral 22 denotes a coil bobbin 22.

  The solenoid 12 shown in FIG. 4 has a pair of lid locking portions 32, 32 each having an L-shape when viewed from the side, respectively, facing the upper edges of the side walls 31a, 31a of the yoke body 31 having a channel-shaped cross section. Is formed, and the opening of the yoke main body 31 is closed by press-fitting the yoke lid 33 between the lid locking portions 23, 23.

  A solenoid 13 shown in FIG. 5 shows a modified form of the solenoid 12 shown in FIG. 4, in which lid locking portions 32, 32 each having an L-shape in side view are relatively attached to one of the upper portions of the opposing side walls 31a, 31a. The upper portion of the other side wall 31a is cut out in a rectangular shape to form an insertion portion 35 of the yoke cover 34, and the yoke cover 34 is press-fitted from the insertion portion 35 to be inserted between the other lid locking portions 32. The yoke main body 31 is closed by closing the opening.

  The yoke main body 41 shown in FIG. 6 is a modified version of the yoke main body 31 shown in FIG. 5, and leaves only one of the L-shaped lid locking portions 32, 32 located on the diagonal line and the other side. Is defined as a column-shaped lid locking portion 33, and the distance between the opposing lid locking portions 32, 33 is set to a width capable of press-fitting the yoke lid or a height of the protruding portion of the L-shaped lid locking portion 32. And the height at which the yoke lid can be press-fitted.

In the yoke main body 41 shown in FIG. 7, rectangular lid insertion portions 43, 43 are formed in the same direction on the opposite side walls 42, 42, respectively, in the width direction, and a yoke lid 44 is press-fitted between the lid insertion portions 43, 43. It is of the type to be crosslinked.
The insertion portion 43 can be adjusted by adjusting the width or the vertical width of the yoke lid 44 so that the yoke lid 44 can be press-fitted, or by adjusting the plate thickness of the yoke lid 44 to the width or the vertical width of the insertion portions 43, 43. .

  The yoke main body 51 shown in FIG. 8 has columnar engaging portions 53, 53 formed by notching, leaving one part of the left and right upper ends in a columnar shape, on one upper side of one of the opposing side walls 52. At the center between the portions 53, 53, a lid locking portion 54 having a T-shaped side view is formed, and on the upper portion of the other side wall 52, locking portions 55, 55 having an L-shaped side view are formed. , Are formed in a state where the engaging portions are opposed to each other.

  The yoke main body 51 is provided with a yoke lid 57 having a cutout portion 56 formed on the front end surface of the yoke main body 51 at the front end thereof for engaging with the base of the T-shaped locking portion 54. The notch 56 is engaged with the base of a T-shaped lid engaging portion 54 formed on the upper portion of the other side wall 52 so that the notch 56 is inserted into the opening portion of the yoke main body 51. Is to close.

  The yoke main body 61 shown in FIG. 9 has a protruding portion 63 having a triangular cross section on the inner peripheral surface of the upper edge of the opposing side wall 62 (one side wall is omitted) so that the respective tops face each other. The yoke lid 64 is pressed against the yoke main body 61 by forming a notch portion slightly smaller than the yoke lid 64 and forming a yoke lid mounting portion 65 thereunder.

  The yoke main body 71 shown in FIG. 10 is formed with spherical projections 73 on the inner peripheral surface side of the upper end of the opposing side wall 72 (one side wall is omitted) so that the curved parts face each other. A notch part slightly narrower than the yoke lid 74 is formed below the yoke lid 74 to form a yoke lid mounting part 75.

The yoke main bodies 61, 71 shown in FIGS. 9 and 10 each have opposed side walls 62, 62 (one not shown), and projecting portions 64, 73 formed on the side walls 72, 72 (one not shown). By pressing the yoke lids 64 and 74 into the yoke lid placement portions 65 and 75 formed below the yoke main bodies 61 and 71, respectively, the yoke bodies 61 and 71 can be closed.
Therefore, in any case, the yoke main body holding the plunger and the yoke lid attached to the opening thereof intersect with each other, and the yoke main body and the yoke lid maintain the pressure contact state. A yoke that is strong against the collision force (impact force) of the plunger operation can be obtained.

In each of the above-described solenoids, a through hole for inserting and holding the plunger is formed in the bottom portion of the yoke main body, and the through hole serves as a guide portion of the plunger. Deviation) does not occur.

Since the solenoid according to the present invention has a yoke lid press-fitted into the opening of the yoke main body having a channel-shaped cross section and is closed, the structure is strong against the impact force of the plunger operation. Can be used.

1, 11-13 Solenoid 2, 21, 31 Yoke main body 2a Through hole 2b Side wall 2c Lid holding part 3 Coil bobbin 4 Yoke lid 4a Engaging part 5 Plunger 6 Stopper

Claims (7)

The stopper at the bottom of the coil bobbin, its proximal end is fixed in a state of protruding from the bottom portion, said coil bobbin, said bottom is decorated so as to be located on the opening side of the cross-section channel-shaped yoke body, the yoke body A solenoid, which is provided with a yoke lid in a crimped state at the opening thereof and closed.
One of the lid holding portions formed on the opposing side walls of the yoke main body is inserted such that the entirety of the yoke lid is inserted from the outside in the facing direction, and the other is that the tip end of the yoke lid is inserted into the other lid holding portion from the inside. solenoids, characterized in that it is formed so as to be press-fitted. The yoke lid,
2. The solenoid according to claim 1, wherein a thickness of the yoke cover is formed to be slightly thicker on a side wall of the yoke main body that is opposed to the cover holder than the cover holding portion formed so as to press-fit and insert the yoke cover. The yoke lid,
2. The plate according to claim 1, wherein a thickness of the plate is slightly larger than a vertical width of a lid holding portion formed so that the yoke lid can be press-fitted and inserted into opposite side walls of the yoke main body. solenoid. The yoke lid,
2. The solenoid according to claim 1, wherein a width of the yoke cover is formed to be slightly larger than a width of a cover holding portion formed to be able to press-fit and insert the yoke cover on opposing side walls of the yoke main body. The yoke lid,
The solenoid according to claim 1, wherein the solenoid is detachable from an opening of the yoke main body. The pair of locking portions in the upper edge of each side wall facing the opening of the yoke body is formed by relatively, in which the lid holder a space formed between the pair of locking portions The solenoid according to claim 1, wherein: A stopper is fixed to the bottom of the coil bobbin such that its base end protrudes from the bottom, so that the coil bobbin is positioned in the channel-shaped yoke main body and the bottom is positioned on the opening side of the yoke main body. After is furnished, in the opening of the yoke body, in order to mount the Yokufuta in crimped state, the entire insert from the outside, which is the insertion of the Yokufuta the cover holding portion of one side wall of the yoke body the A method of manufacturing a solenoid, comprising inserting a tip end of a yoke lid into a lid holding portion of the other side wall in a press-fit state from the inside and cross-linking the same.

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